Create trigger - build SQL statement and execute it

I know I am likely over thinking this!

I want an on insert trigger on a table "employee". Also open to other options as well.

when a new record is inserted into the employee, I want to generate a script , and run it. This will create a user in our APEX system.

I can run it on the command line and manually execute it in a sql script no problem. Trying to automate it so I don't have to create a user each time a new user is onboarded.

Trying to figure out how to do the same thing but in a trigger - when a new record is inserted, build and execute the command.